Flag rfchange_inprogress in struct rtl_ps_ctl is protected by a spinlock
in most routines but not in rtl8723e_dm_watchdog(), which could
lead to a race condition. The necessary locking to prevent this condition
is added.
Reported-by: Pavel Andrianov <andria...@ispras.ru>
Signed-off-by: Larry Finger <larry.fin...@lwfinger.net>
Cc: Pavel Andrianov <andria...@ispras.ru>
---
drivers/net/wireless/realtek/rtlwifi/rtl8723ae/dm.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/dm.c
b/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/dm.c
index 4c1c96c..3900e10 100644
--- a/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/dm.c
+++ b/drivers/net/wireless/realtek/rtlwifi/rtl8723ae/dm.c
@@ -816,6 +816,7 @@ void rtl8723e_dm_watchdog(struct ieee80211_hw *hw)
if (ppsc->p2p_ps_info.p2p_ps_mode)
fw_ps_awake = false;
+ spin_lock(&rtlpriv->locks.rf_ps_lock);
if ((ppsc->rfpwr_state == ERFON) &&
((!fw_current_inpsmode) && fw_ps_awake) &&
(!ppsc->rfchange_inprogress)) {
@@ -829,6 +830,7 @@ void rtl8723e_dm_watchdog(struct ieee80211_hw *hw)
rtl8723e_dm_bt_coexist(hw);
rtl8723e_dm_check_edca_turbo(hw);
}
+ spin_unlock(&rtlpriv->locks.rf_ps_lock);
if (rtlpriv->btcoexist.init_set)
rtl_write_byte(rtlpriv, 0x76e, 0xc);
}
--
2.1.4
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